Tailoring of optoelectronic properties of InAs/GaAs quantum dot nanosystems by strain control

Woong Lee, Keesam Shin, Jae Min Myoung

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Full three-dimensional numerical analysis based on continuum elasticity and model solid theory has been carried out to evaluate some possible means of tailoring the optoelectronic properties of InAs/GaAs quantum dot (QD) nanosystems. Numerical results predicted that while the stacking period control leads to the shifts in valence band edges, incorporation of InxGa1-xAs ternary strain relief layer (SRL) causes composition-dependent shifts in conduction band edges. On the other hand, modification of the SRL shape itself did not yield significant changes in the confinement potentials. It is therefore suggested that strain control by incorporation of ternary intermediate layers combined with geometry controls, would allow greater flexibility in the tailoring of the opto-electronic characteristics of QD-based systems.

Original languageEnglish
Pages (from-to)145-150
Number of pages6
JournalElectronic Materials Letters
Volume5
Issue number4
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

Strain control
Nanosystems
Optoelectronic devices
Semiconductor quantum dots
Valence bands
Conduction bands
Numerical analysis
Elasticity
Geometry
Chemical analysis
gallium arsenide
indium arsenide

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

Cite this

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abstract = "Full three-dimensional numerical analysis based on continuum elasticity and model solid theory has been carried out to evaluate some possible means of tailoring the optoelectronic properties of InAs/GaAs quantum dot (QD) nanosystems. Numerical results predicted that while the stacking period control leads to the shifts in valence band edges, incorporation of InxGa1-xAs ternary strain relief layer (SRL) causes composition-dependent shifts in conduction band edges. On the other hand, modification of the SRL shape itself did not yield significant changes in the confinement potentials. It is therefore suggested that strain control by incorporation of ternary intermediate layers combined with geometry controls, would allow greater flexibility in the tailoring of the opto-electronic characteristics of QD-based systems.",
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Tailoring of optoelectronic properties of InAs/GaAs quantum dot nanosystems by strain control. / Lee, Woong; Shin, Keesam; Myoung, Jae Min.

In: Electronic Materials Letters, Vol. 5, No. 4, 01.12.2009, p. 145-150.

Research output: Contribution to journalArticle

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